Maximum principle and convergence of fundamental solutions for the Ricci flow

Details Maximum principle and convergence of fundamental solutions for the Ricci flow Maximum principle and convergence of fundamental solutions for the Ricci flow

2007-11-08

arxiv.org/abs/0711.1236v1

Mathematics

Differential Geometry

15 pages

Scientific paper

In this paper we will prove a maximum principle for the solutions of linear parabolic equation on complete non-compact manifolds with a time varying metric. We will prove the convergence of the Neumann Green function of the conjugate heat equation for the Ricci flow in $B_k\times (0,T)$ to the minimal fundamental solution of the conjugate heat equation as $k\to\infty$. We will prove the uniqueness of the fundamental solution under some exponential decay assumption on the fundamental solution. We will also give a detail proof of the convergence of the fundamental solutions of the conjugate heat equation for a sequence of pointed Ricci flow $(M_k\times (-\alpha,0],x_k,g_k)$ to the fundamental solution of the limit manifold as $k\to\infty$ which was used without proof by Perelman in his proof of the pseudolocality theorem for Ricci flow.

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